<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>02-body及其常用字标签</title>
</head>
<body>
<p>
    <!--
    sub:下标
    sup:上标
    -->
    (2+num) <sup>2</sup>+log <sub>2</sub>10 <sup>10</sup>
</p>
</body>
</html>